Glass blowing machine



Dec. 19, 1933. R. PATTERSON 1,939,917

GLASS BLOWING MACHINE Filed Feb. 5, 1931 3 Sheets-Sheet 1 i3 49 5 4 A 44' 0 20 l I I a .10

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Patented Dec. 19, 1933 UNITED STATES PATENT OFFICE Carr-Lowrey Glass Application February 5,

20 Claims.

, This invention relates to glass blowing machines and is designed primarily for-the purpose of producing bottles and other containers which are oblong in cross-sectional contour.

Heretofore in the production of bottles of this kind' by machine, various attempts have been made to locate the seams along diametrically opposed ,corners so as to render them practically invisible; In order to thus locate the seams the glass has been initially shaped in elliptical form within a blank mold and has subsequently been transferred to the finishing mold so that the seams on the blank have been disposed where they, as nearly as possible, will match with and merge into the corner seams produced by the finishing mold. As anactual fact, however, when the blankhas been given its final shape in the finishing mold the seams on the blank have been more or less distorted or drawn out of the positions which it was intended that they ultimately occupy. Consequently the finished bottle has generally been provided not only with corner seams iormed by the finishing mold but also with remnants of the blank seam extending along waved lines on one or more faces of the finished bottle. This has resulted in an unsightly appearance objected to by the customer and frequently causing loss to the manufacturer because of the many bottles or other containers which have not been accepted.

It is an object of the present invention to provide a bottle blowing machine with a finishing mold of novel construction whereby, when the blank is transferred thereto from the blank mold, the seams on the blank will be flattened or obliterated against the walls of'the finishing mold without being drawn laterally and producing irregular lines. It is also an object of the invention to provide a finishing mold which, while in active position, has the longitudinal axis of the blank-receiving cavity in alinement with the longitudinal axis of the cavity in the blank mold without, however, resulting in the formation of seams by the finishing mold at any points other than along diametrically opposed corners of the finished container.

A still further object is to'provide a finishing mold one of the members of which is capable of a limited rotary motion so that, when themold is opened to release the finished container, there is no danger of any portion of the mold pressing into or otherwise distorting the-finished container.

With the foregoing and'other objects in view which will appear as the description proceeds, the invention resides in the combination and arrange- 'Co., Baltimore, Md;

1931. Serial No. 513,746

ment of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings, the preferred form of the invention has been shown.

In said drawings:

Figure 1 is a View more or less in diagram show ing, in plan and in section; the finishing and blank molds respectively of a glass blowing machine, these being illustratedin the relative positions assumed thereby when the molds are closed.

Figure 2 is a plan view of the finishing mold. j

Figure 3 is a section therethrough on the line 3-3, Figure 2, showing a'blank suspended there in prior to the final blowing operation.

Figure 4 is a section on line 44, Figure 3.

Figure 5 is a view similar to Figure 4 showing the mold opened and the finished container supported between the members thereof, different positions of one of the members of the mold during the opening operation being indicated by broken lines.

Figure 6 is a section on line 6-6, Figure 2.

Referring to the figures by characters of refermembers 1 and 2 are mounted to swing about an axis 5 and any suitable means, including crank arm 6 and links '7 or the like may be employed for moving the'members 1 and 2 toward and from each other. A neck ring of the usual or any preferred construction is supported beneath the mold members 1 and 2 by an arm 8 and the arm, in turn, is mounted to swing with a shaft 9 for the purpose of transferring an elliptical blank from the blank mold to position in the finishing mold. The construction and operation of the blank mold and neck ring constitute no part of the present invention and for this reason these parts have not been shown in detail. It is merely essential that the elliptical cavity 4 be arranged with its longitudinal axis in line with the meeting faces 3 so that, when the blank is formed, the seam produced will be centrally located on opposed portions thereof, and that the blank, when transferred to the finishing mold, will be positioned longitudinally within the cavity in said finishing mold as hereinafter explained.

The finishing mold B includes opposed arcuate jaws 10 and 11 which are mounted to swing toward and from each other about a pivot element 12, any suitable mechanism being provided for this purpose. For example, each jaw can be connected by a link 13 to a crank arm 14 and the two crank arms can be actuated by any mechanism provided for that purpose.

Each of the jaws is formed with a substantially semi-circular inner face as shown at 15 and the top of each jaw has a channel 16 extending thereinto and substantially parallel with the circular face. Each of the jaws is provided at an intermediate point with a pin 17 on which is mounted a spring 18 housed in the jaw. This spring serves to hold one end of the pin yieldingly pressed beyond the circular face of the jaw. The other or outer end of the pin can be provided with a head 19 or the like by means of which the pin can be retracted against the action of the spring.

Jaw 10 supports a mold member 20 which has a flange 21 formed with a depending rib 22 seated in the channel 16 in said jaw. Pin 17 projects into a recess 23 in the mold member and serves to lock said member against movement in any direction relative to its supporting jaw.

Jaw 11 supports afmold member 24 which has a flange 25 at its upper end provided with a depending rib 26 adapted to extend into the channel 16 in body 11. A groove 27 is provided. in the mold member 24 for the reception of the adjacent pin 17. Thus member 24 is permitted a limited rotation or sliding movement relative to jaw 11.

The bottom member of the finishing mold has been indicated at 26' and can consist of a disc formed with an annular groove 27. This disc is mounted for rotation in a suitable support 28 provided therefor, there being a stud 29 extending from the disc and rotatable in thesupport'.

A centering pin 30 extends from the disc and projects into the paths of the two mold members 20 and 24. Each of these members has a recess 31 for receiving the pin.

The mold members 20 and 24 are adapted to fit snugly against each other when the finishing mold is closed. When thus located the mold members will receive and grip pin 30 so as to hold the bottom mold 26' properlycentered' relative to the mold members 20 and 24.

Each of the mold members 20 and 24 is recessed as shown at 32 so that when the two mold members are brought together, these recesses will cooperate to form a cavity 33 of such shape as to produce a finished article of the desired contour. As the mold is designed primarily for producing oblong or substantially oblong containers, the cavity 33 will likewise be oblong or substantially of that shape. The longitudinal center of the cavity33 will be in the same plane with the meeting faces 3 of the blank mold, but the two mold members 20 and 24 will not come together in this plane. On the contrary these mold members have contacting faces 34 which extend to diametrically opposed corner portions of the cavity 33. Thus each wall of the cavity is unbroken and the only seams produced by the finishing mold will be along diametrically opposed corner portions of the cavity as will be apparent by referring particularly to Figure 4.

As shown in Figure 2 a spring 35 connects jaw' blank mold 1 and the members of the blank and away from the molded object.

finishing molds have been moved apart, the blank is transferred to the finishing mold and supported by the neck ring or other means until the members 20 and 24 are brought together to the positions shown in Figures 2 and 4. Normally the mold member 24 has one side thereof projected beyond the end of jaw 11 as shown in Figure 5, said member 24 being held yieldingly in this position by the spring 35 and being limited in its movement by the pin 17. Thus when the mold members 20 and 24 are swung together the projecting portion of the member 24 will first come against the corresponding portion of member 20 and as the jaws continue to move toward each other the mold member 24 will be pushed back along its jaw 11 until both of the members 20 and 24 are brought together between cavity 33 and pivot 12.

The finishing mold thus completely encloses the blank which has been brought to position therein with its longitudinal axis in a plane intersecting the centers of the opposed narrow walls of cavity 33 and the blank'is then given its final blow. This will cause the glass to be distributed in the cavity over the several faces thereof and the seams which had been produced by the blank mold will be pressed against the narrow walls of cavity 33 and completely obliterated.

Any. seams produced bythe finishing mold will be located along those corner portions of the cavity 33 where the mold members 20 and 24 come together. Consequently the finished bottle or other container will be free of all seams except such as are located along diametrically opposed corners and these will be practically invisible.

Obviously, because of the peculiar location of the mold members 20 and 24 it would ordinarily be impossible to move them apart without causing themold member24 to dig into and scar or otherwise mutilate the adjacent surface of the finished. bottle. This is due to the fact that the mold members do not come together in the plane in which are located the axes of movement of the members of the two molds A and B. In order to overcome this objectionable mutilation of the finished article the mold member 24 has been mounted in the particular manner described. As a result of the construction disclosed, when the jaws 10 and 11 begin to move from each other the tensioned spring 35 acts to impart a rotating motion to the mold member 24 so as to keep the outer side thereof in. contact with the opposed mold member 20 and at the same time move the inner side portion of mold member 24 back from the molded object. Thus the path of that portion of mold member 24 between cavity 33 and pivot 12 will not intersect any portion of the molded object but, instead, will be along a line extending Said portion of the mold member 24 will successively assume positions .such as indicated at a and b in Figure 5.

As a result of the foregoing action when the finishing mold begins to open the molded object will be freed therefrom on all sides and will be left uninjured by any glancing blow or other contact with the moving moldrnembers.

What'is claimed is:

1. In a glass blowing machine a separable blank mold,'a finishing mold fixed relative to the blankmold and comprising members cooperating to form a substantially oblong cavity having unbroken walls, said members contacting along dia- 1 metrically opposed corners of the cavity, and

mold and depositing it in said cavity with the seamsof the blank spaced from the comers of the cavity.

2, m a glass simmmachine a blank mold having an elliptical cavity, said mold comprising mold and bisccting diametrically opposed corners of the cavity, the longitudinal axes of both cavities being in alinement, and means. for conveying, ablank. from the blank mold and depositing it in said cavity of the finishing mold with the seams of the blank spaced from the corners of the cavity. V

3. In a glass blowing machine a blank mold having an elliptical cavity, said mold. comprising opposed members contacting at the ends or the longitudinal horizontal axis of the cavity, a finishing mold constantly fixed relative to the blank mold and comprising offset members forming a subslantially oblong cavity, said members while contacting being positioned with their plane of contact obliquely disposed relative to the plane or contact of the contacting faces of the blank mold and bisecting diametrically opposed corners of the cavity in. the finishing mold, the longitudinal axes of both cavities being in alinement, and means for transferring a blank from the blank mold to the finishing mold and positioning the blank parallel with the sides of the cavity in the finishing mold with its seams spaced from the corners of said cavity.

4. In a glass blowing machine a blank mold including members cooperating to forms cavity having a long horizontal axis terminating at the meeting edges of the members, a finishing mold constantly fixed relative to the blank mold and having opposed members cooperating to provide an angular cavity having a long axis alining with said axis of the cavity in me blank mold, themembers of the finishing mold contacting along a plane obliquely disposed relative to the plane or the contacting faces of the members 01 the blank mold and bisecting diametrically opposed corner portions of the cavity in the finishing mold and means for transferring a blank from the blank mold to the finishing mold with its seams spaced from the corners of said cavity. a I

5, In a glass blowing machine a blank mold having an elliptical cavity, said mold comprising opposed members contacting at the ends of the longitudinal horizontal axis or the cavity, a onishing mold constantly fixed relative to the blank mold and comprising onset members forming a substantially oblong cavity, said members contact ing along a plane obliquely disposed relative to the plane or the contacting faces of the members of the blank mold and bisecting diametrically O posed corners of the cavity, the longitudinal .axes of both cavities being in alinement, means for transferring a blank from the blank mold to the finishing mold and positioning the blank parallel with the sides of the cavity in the finishing mold and with its seams spaced from the comers of said cavity, and separate means for simultaneously moving the members of the finishing mold about different axes respectively to withdraw all portions of said members abruptly from contact with an article shaped thereby.

6. In a glass blowing mold opposed jaws, a pivotal connection therebetween, means for moving thejaws. toward and from each other, opposed moldmembers supported by the respective jaws and cooperating to form a cavity substantially oblong in cross-section, said members contacting along diametrically opposed corners of the cavity which are out of line with the pivotal connection,

and means for automatically shifting one oi the members relative to its jaw to clear a formed article in the cavity when the jaws are moved apart.

7. In a glass blowing mold opposed jaws, a piv-' otal connection therebetween, means for moving the jaws toward and from each .other, opposed 'mold members supported by the respective Jaws and cooperating to a form a cavity substantially oblong in cross-section, said members contacting along diametrically opposed corners of the cavity which are out of line with the pivotal connection, and a spring for shifting one of. the members on its jaws to clear a formed article in the cavity when the members are moved apart.

8. In a glass blowing mold opposed jaws, a pivotal connectiontherebetween, means for moving the jaws toward and from each other, opposed mold members supported by the respective jaws and cooperating to form a cavity substantially oblong in cross-section, said members contacting along diametrically opposed corners of the cavity which are out of line with the pivotal connection, a spring for rotating one of the members relative to its jaw to clear a formed article in the cavity" when the members are moved apart, the other" member constituting means for restoring the shifted member to normal position against the action of the spring when the membersare brought together. 7

9. In a glass blowing mold opposed jaws, a piv- 1otal connection therebetween, means for moving the jaws toward and from each other, opposed -mold members supported by the respective jaws and cooperating to form a cavity substantially oblong in cross-section, said members contacting alongdiametrically opposed corners of the cavity which areout of line with the pivotal connection, a-spring for rotating one of the members relative to its'jaw to clear a formed article in the cavity when the members are moved apart, the other member constituting means for restoring the shifted'member to normal position against the action or the spring when the members are brought together; a rotatable bottom mold member adapted to be embraced by the opposed mold I members, a'nd'means thereon cooperating with the opposed mold members for centering the bottom mold member when the mold is closed. 7

10. In a glass blowing mold opposed jaws, a pivotal connection therebetween, means for moving the jaws toward and from each other, opposed mold members" supported by the respective jaws and cooperating to form a cavity substantially oblong in cross-section, said members contacting along diametrically opposed corners of the cavity which are out of line with the pivotal connection,

, a. spring for shifting one of the members on its jaw to. clear a formed article in the cavity when the members are moved apart, and means for limiting the movement of said mold member under the action of the spring.

11. In a glass blowing mold opposed jaws, a

along diametrically opposed corners of the cavity which are out of line with the pivotal connection,

a spring for shifting one of the members on its jaw to clear a formed article in the cavity when the members are moved apart, and means for limiting the movement of said mold member under the action of the. spring, said means including a pin projecting into said vmember from its jaw, there being a groove in the member for receiving the pin.

12. In a glass blowing mold relatively movable elements, mold members carried by the respective elements and cooperating to form a substantially oblong cavity therebetween, said members contacting along diametrically opposed corners of the cavity when closed together, and means for automatically imparting a limited rotation to one of the members about an axis extending through its cavity, when said members are moved apart, said rotation being relative to the movable elements. 13. In a glass blowing mold relatively movable supporting elements, mold members carried by the respective elements and cooperating to form a substantially oblong cavity therebetween, said members contacting along diametrically opposed corners of the cavity when closed together, means for automatically imparting a limited rotation to one of the members relative to its supporting element when said members are moved apart, said "rotation being about an axis extending between -mold relative to the mold members when said members are closed together.

14. In a glass blowing mold opposed relatively movable supporting members, mold members carried thereby and rotatable relative thereto about an axis extending between the mold members, a rotatable bottom mold adapted to be embraced by said mold members, and cooperating means on the bottom mold and mold members'for automatically rotating the bottom mold relative to the supporting members to position said bottom mold relative to the mold members when said members are closed together. 7 a

15. In a glass blowing mold opposed jaws, a pivotal connection therebetween, means for moving the jaws toward and from each other, opposed mold members supported by the respective jaws and cooperatingto form a cavity having diametrically opposed corners, said members contacting along diametrically opposed cornersof the cavity which are out of line with the pivotal connection, and means for automatically shifting one of the members relative to itsjaw to clear a formed article in the cavity when the jaws are moved apart. a a r 16. In a glass blowing mold opposed jaws, a pivotal connection therebetween, means for moving the jaws toward and from each other, 01 posed mold members supported by theres'pective jaws and cooperating to form a cavity having diametrically opposed corners, said members contacting along diametrically opposed corners of 1 diametrically opposed corners, said members contacting along diametrically opposed corners of the cavity which are-out of line withthe pivotal connection, means for rotating one of the mem.

bers relative to its jaw to clear a formed article in the cavity when the members are moved apart, the other member constituting means for restor ing the shifted member to normal position against the action of said means when the members are brought together.

18. Ina glass blowing mold opposed jaws, a

pivotal connection therebetween, means for moving the jaws toward and from each other, opposed mold members supported by the respective jaws and cooperating to form a cavity having diametrically opposed corners, said members contacting along diametrically opposed corners of the cavity which are out of line with the pivotal connection, means for shifting one of the members onits jaw to clear a formed article in the cavity when the members are moved apart, and means for limiting the movement of said mold member under the action of said shifting means.

.19. In a glass blowing mold opposed jaws, a pivotal connection therebetween, means-for moving the jaws toward and from each other, op-

posed'mold members supported by the respective jaws and cooperating to form a cavity having diametrically opposed corners, said members contacting along diametrically opposed corners of the cavitywhich are out of line with the pivotal connection, a spring for shifting one of the members on its jaw to clear a formed article in the cavity when the members are moved apart, and means .forlimiting the movement of said mold 'member under the action of the spring, said molds being constantly in 'alinement' when the molds are closed,the members of the finishing mold being positioned with their meeting faces, when closed, in a plane obliquely disposed relative to the plane of the meeting faces of the blank mold members and. means for conveying 

